Cowl for gas lamps



June 2, 1970 P. KREIS COWL FOR GAS LAMPS Filed Aug. 21, 1967 3,515,865 COWL FOR GAS LAMPS Philipp Kreis, 34-36 Neumarkter Str., Munich, Germany Filed Aug. 21, 1967, Ser. No. 662,058 Claims priority, applicatioal (ermany, Aug. 23, 1966,

Int. Cl. F21s 13/02 US. Cl. 24074 8 Claims ABSTRACT OF THE DISCLOSURE The invention relates to a cowl for gas lamps (which term is intended to include lamps which burn town gas as well as those which burn vapourised fuel such as paratfin), more especially for fixing to a wall, of the type having a cover bowl and a mounting support for a burner with a shutoff device for the gas supply.

Known wall lamps usually have a downwardly directed burner, controlled by a quick-closing valve. So as to be able to shield these lamps by means of an attractive cover bowl, the usual bracket, reflector, valve and connecting pipe are combined into one convenient constructional unit which necessitates a construction having a conically tapering back Wall. In the case of such a conical mounting support, however, it is diflicult and in volved to superimpose the cover bowl. Moreover, the fitting being at the top makes somewhat complicated the construction of the housing or the cowl which carries the cover bowl and which conducts away the waste gas stream.

I have determined that a wall lamp having an upright burner or split fitting allows more favourable possibilities for the construction of the cowl, and it is therefore the object of the present invention to provide for a simpler, more advantageous and attractive cowl.

To achieve this object the invention therefore provides a lamp cowl whose back wall which is to be attached to the wall is provided with parallel lateral edges which carry stop devices for a cover bowl to be superimposed thereon.

Such a back wall having lateral inclined faces which run parallel, and whose lateral edges can advantageously be developed into edge beads as sliding guides, is especially advantageous.

In a preferred embodiment of the cowl, the back wall continues at the top with a deflecting tongue for the waste gas stream, the said tongue being directed obliquely forwards and upwards. Advantageously this tongue is made integral with the back wall. Also the back wall can have, at the top, slip-n slots for a detachable deflector cover whose rim is bent downwards for reinforcement and for deflecting the waste gas stream downwards.

A burner holder of the lamp, which holder, if it is fastened at the bottom, can at the same time form an arcuate apron for shielding air flow to the burner, can be attached to the back wall in a simple manner, for example by riveting.

Mounted advantageously in triangular arrangement on the rear side of the back wall are spacers which serve to space the back wall of the lamp from the wall on which the lamp is mounted far enough for a cold air stream to pass between the two walls, so that the gas lamp of the invention can be mounted in safety on room walls of wood or other combustible materials.

In accordance with a further advantageous embodiment of the invention lighting holes are provided into the back wall. Firstly, the hand holding the lighting agent, for example a match, is protected by these lighting holes and secondly they may correspond to the most favourable lighting position of the burner. Moreover, removal of the cover bowl, which may be a complicated operation, is rendered unnecessary.

The lamp cowl of the invention may be constructed so as to be particularly simple in its construction, since it may consist only of a few parts which can be manufactured in one piece. The back wall forms a favourable mounting for the easily detachable cover bowl. The deflecting tongue and, if present, the deflector cover, ensure that waste gas stream is properly distributed which also makes mounting of the lamp close to a room ceiling possible, whilst the mounting of the lamp to be spaced away from its supporting wall to favour formation of a cold air stream between the back wall of the lamp and the mounting wall makes it possible to suspend the lamp on any wall of a room. Furthermore the back wall being of trough shape or synclinal shape having inclined faces ensures that such back wall reflects the burners light and heat uniformly and with great intensity.

The invention will be described further, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a cross-sectional side elevation of a preferred embodiment of the lamp cowl of the invention; and

FIG. 2 is a fragmentary cross-sectional plan view taken along the line IIII of FIG. 1.

The illustrated gas lamp cowl comprises a back wall 1 and a cover bowl or shade 2. As is more especially evident from FIG. 2, the back wall 1 is formed by a flat central face 3 and lateral inclined faces 4 which run parallel (i.e. are parallel sided) and have rounded edge beads 5. At the top, the central face 3 merges into an integral deflecting tongue 6, whose top edge 7 ends approximately on the same level as the upper rim 8 of the cover bowl 2. On the inside of its vertical rim 9, this cover bowl 2, which is made of glass, plastic mesh or similar translucent material, carries guide strips 10 having lateral guide flaps 11 and 12, which butt against the edge beads 5, the guide flap 12 being provided with a dimple or rib 14, which engages into an engagement formation in the form of a complementary recess or slot 15 of a stop spring 16 on the back wall and is retained by such engagement. In the case of this type of mounting the cover bowl can be pushed on from above, and therefore the stop spring 16 which carries the recess or grooves 15 has, on its bottom edge, a detent 17, against which the flap 12 strikes in the pushed-on position. The stop spring 16 can be bent upwards or inwards at the side at which the cover bowl is being pushed in, to permit fitting of the bowl. The cover bowl with its guide strips 10 is symmetrically designed, so that in any of its longitudinal positions it can be pushed against the back wall.

Punched into the inclined faces 4 of the back wall are lighting holes 20, through which any desired lighting agent, such as a match, can be introduced even when the cover bowl has been superimposed. The tabs (not visible) which arise when these holes are punched out can be utilised as introduction flaps. A seating 21 for a temperature-sensing element 22 (such as a thermocouple) is also formed in the back face 3. This element 22 is connected to a safety valve (not illustrated) by a cable 23 extending down the back of the back wall, and the element 22 is positioned with a sensitive tip thereof exactly above a burner which is only shown diagrammatically. Because of its position the temperature-sensing element responds very uniformly.

Fastened to the lower rim of the back wall is a burner holder 26, into which the burner 25 is screwed. The burner holder 26 can, if desired, be forked and may be formed with a supplementary perforation 27, for the fitting of a supplementary safety valve (not shown).

The burner holder 26 is drawn downwards on three sides to form an apron 28, so as to shield the air stream to fuel nozzle 29 of the burner 25.

Two spacer sleeves 30, through whose holes 31 fastening screws (not shown) can be inserted, are secured to the back wall 1 of the lamp and these conveniently serve to fasten the burner holder 26 to the back wall 1. A further spacer 32 is advantageously fastened to the wall 1 at a position corresponding to that of the stop spring 16. The spacer 32 forms a U-shaped curved leg 33, in whose central piece a hole 34 is provided for a fastening screw (not shown) and whose lateral supporting limbs present a small abutment area. Situated in the back wall opposite the fastening hole 34 is a larger hole 35 through which the head of the fastening screw can pass for engagement into the hole 34. Provided above the cover bowl 2 is a further deflector cover 40, which is located into lateral slots 41 of the inclined faces 4 of the back wall. This deflector cover is provided with a downwardly curved ri-m 42, so as to deflect the rising gases downwardly outside the cover bowl.

The inside surfaces of the back wall 1 are burnished or polished so as to act as a mirror which reflects the light and heat from the burner 25.

The deflecting tongue 7 conducts the rising waste gases forward to the deflector cover 40. If the top edge of the tongue 6 is approximately on a level with the rim 8 of the cover bowl, then, despite it being extensively masked, the waste gas stream is carried off outwardly, without deposits occurring on the cover bowl or the bowl being damaged.

The deflector cover can be removed if the wall lamp is desired to be attached high on the wall of a living room, the deflecting tongue then ensuring a suflicient deflection of the gas streams from the wall of the room.

Although the back wall of the illustrated specific em- 'bodiment is formed from flat surfaces set at an angle to each other, curved faces, which together form a depressed arched surface, could be provided in order to give rise to a synclinal shape or trough shape advantageous for the waste gas conveyance as well as for the attachment of the various parts. However, even with a substantially flat back wall many of the discussed advantages can be achieved.

What is claimed is:

1. In a gas lamp for attachment to the side of a vertical wall, the combination including back wall means, burner means, and cover bowl means to be removably supported by the back wall means, said back wall means including a pair of oppositely disposed laterally outwardly inclined faces having vertically extending parallel respective beaded margins, spring member means attached to the back wall means adjacent each of said beaded margins, said cover bowl means having parallel vertical opposite flanged margins for vertical sliding frictional engagement between the respective beaded margins of said faces and said respective spring member means, said back wall means also including supporting means for said burner and a forwardly directed deflecting tongue disposed over said burner means, and spacer means for mounting the back wall means spaced from a vertical supporting wall.

2. The invention defined in claim 1, wherein said supporting means for the burner includes a forwardly directed apron integrally formed with said back wall means.

3. The invention defined in claim 1, wherein said flanged margins of the cover bowl means include a pair of oppositely disposed inwardly directed straight guide flaps to be received between said beaded margins of the faces and said spring member means.

4. The invention defined in claim 3, wherein said guide flaps and said spring member means are provided with complementary dimpled indentations for coacting engagement to position the cover bowl means in a predetermined position.

5. The invention defined in claim 1, wherein said back Wall means includes a forwardly directed detachably mounted deflector cover disposed above said burner means and cover bowl means and extending horizontally beyond the area defined by the cover bowl means.

6. The invention defined in claim 1, wherein said deflecting tongue extends forwardly from the upper part of the back wall means and terminates approximately at the level of the upper extremity of the cover bowl means.

7. The invention defined in claim 1, wherein said spacer means for mounting the back wall means includes a plurality of internally threaded sleeves projecting rearwardly from the rear surface of the back wall means.

8. The invention defined in claim 1, wherein said back wall means is provided with at least one opening to permit insertion of means for lighting the burner means when the cover bowl means is in place.

References Cited UNITED STATES PATENTS 1,007,881 11/ 1911 Luther 24079 1,104,473 7/1914 Brooks 240-79 1,689,019 10/1928 Fullerton 61; al. 240l33 2,051,213 8/ 1936 Hamilton.

FOREIGN PATENTS 444,954 3/ 1936 Great Britain.

NORTON ANSHER, Primary Examiner A. MATHEWS, Assistant Examiner U.S. Cl. X.R. 

